code: def test_pickle_hello(self, host, client):
      def hello(message):
          print("Got hello: ", message.foo, message.bar["key"].value)
          return (
              "this is a response to message '"
              + str(message.foo)
              + "'",
              message.bar["key"].value,
          )
  
      host.define("hello", hello)
  
      for _ in range(10):
          input = MyClass()
  
          print("sending ", input.foo, input.bar["key"].value)
  
          msg, value = client.sync("host", "hello", input)
          print("sync: ", msg, value)
          assert value == input.bar["key"].value
  
file_path: moolib/test/unit/test_pickle.py
imports: import random
  import pytest
  import moolib
label_desc: Use image node_id 3 for calling the TestMoolibPickle obj's underlying member method code with example usage: obj.test_pickle_hello(host, client) and returns: unknown,  message